the straight low
The absolute, unadulterated truth. You've got to give your clients the straight low as soon as possible to salvage any of this. They're going to find out one way or another, so you might as well do it now. I just feel like these doctors are never giving me the straight low about her condition.
Sl. the absolute truth. (From lowdown = the story; the truth.) Can you give me the straight low on this mess? Nobody ain't gonna tell no warden the straight low; you can be sure of that.
n. the absolute truth; the true lowdown. (Prisons.) Nobody ain’t gonna tell no warden the straight low; you can be sure of that.